I don't think it's needed. It's redundant. A new Spanish learner might think it's needed because they didn't understand or missed the nuance, but we don't speak mature languages so that the least of us understand it.
I don't speak the same English to my project team at work that I speak to my three year old nephew.
We don't say 'play the instrument' simply because people forgot 'tocar'.
I think it seems fair to accept "I'm playing an instrument in the park". If I looked at a sentence in English that said "I am playing in the park", I wouldn't know the context of whether it was a game or an instrument. Some of the meaning of the sentence is lost when translated to English without including the instrument.
Explicitly mentioning the instrument in a Spanish sentence, "Estoy tocando un instrumento en el parque", would be redundant.
This is true, however there is another verb for play in Spanish -jugar- so just as in English, we have two meanings for 'play'. Perhaps tocando has only absorbed the alternate meaning and is being used for playing in general. In conversation, I believe that in both languages words are used loosely whereas in more formal applications the specific word is applied.
"Bunting" is also a correct translation according to my Oxford sp-eng dictionary. Tocando in the sense of "playing" an instrument is unclear. Most would guess jugando for "I am playing in the park" unless an instrument was specified. "Playing" isn't a clean or uniquely correct translation here.
Edit: As pointed out below, you don't use tocando for bunting. A bunt is un toque de bola, to bunt is tocar la bola. However, my post wasn't a "challenge" to anyone or "mindless" as two posters commenting below characterized it. It was an attempt to make sense of an unclear sentence, which a number of others have tried to do in this thread. Bunting made sense to me because, here in the US, it is a common activity to practice in a park.
This from the RAE:
Dar suavemente con la quilla en el fondo.
So what this sentence is really about is sailing a ship through the park and just gently touching bottom somewhere near the swing sets.
My point is, let us use a little intelligence here. At this stage of the process all of us should be past the point where we play this definitions game, the one where we constantly challenge the program to accept every possible meaning of every word. When the phrase makes perfect sense as it stands, and without some absurd invented context, then any comment that you make about definitions that isn't a question like "can it mean this..." is just not helping anyone.
Also, if you really think it CAN mean something else, check before posting. Had you looked outside the dictionary you would have seen that, although toque el bola means "bunt the baseball", that action is never "tocando el beisbol" to mean bunting.
Alphonse - thank you so much for this post! I get a lot of benefit from Duo but the mindlessness of too many users drives me to distraction and away from using it. I note that you had been down-voted (presumably for calling for intelligence) so I have up-voted you back up to zero! There are so many good and helpful users that make it worthwhile and I come back again.
Okay, I'm sorry, I've read all the comments and I still don't understand. It's implied that there is an instrument being played in the park simply because of the word 'tocando'? And if I had used 'jugando', I would be implying that I am playing games, soccer, frisbee etc. like one would in a park?
Here's what I managed to gather about levels (level - points to next level - points by the end of the level):
1 - 60 → 60
2 - 60 → 120
3 - 80 → 200
4 - 100 → 300
5 - 150 → 450
6 - 300 → 750
7 - 375 → 1,125
8 - 525 → 1,650
9 - 600 → 2,250
10 - 750 → 3,000
11 - 900 → 3,900
12 - 1,000 → 4,900
13 - 1,100 → 6,000
14 - 1,500 → 7,500
15 - 1,500 → 9,000
16 - 1,500 → 10,500
17 - 1,500 → 12,000
18 - 1,500 → 13,500
19 - 1,500 → 15,000
20 - 2,000 → 17,000
21 - 2,000 → 19,000
22 - 3,500 → 22,500
23 - 3,500 → 26,000
24 - 4,000 → 30,000
So, for example, I have level 19 in Spanish, I have to earn 400 points to get to level 14, and I'll have a total of 15,000 points when I finish level 19 and get to level 20.
After you earn 30,000 points, you are level 25 and your level does not grow anymore.